A few weeks ago I found an old (40 years or so) Pentacon 135mm f/2.8 lens, made in DDR, famous for it's bokeh. I started of by dismantling and cleaning it inside, as it was obvious it had not been used for many years. The pictures I have made with it so far are pleasing to me. The smooth background, the bubbles against the light, the sharpness. Disadvantage is that (of course) it is manual, and it produces purple fringes in high contrast areas (chromatic abberation). This can be corrected with modern software. A useful addition to my photography equipment, which now consists of a Pentax kx, a k5, pentax dal 18-55, pentax dal 55-300, sigma 18-50, sigma 105 macro, pentacon 135 and an old pentax 50mm f/1.7 On the wishlist is a Sigma 85mm F/1.4
